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Rate constants at 297°K for proton transfer reactions with NH3. Comparisons with classical theories and exothermicity

✍ Scribed by R.S. Hemsworth; J.D. Payzant; H.I. Schiff; D.K. Bohme

Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
507 KB
Volume
26
Category
Article
ISSN
0009-2614

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✦ Synopsis

Rate constants for proton transfer reactions of the type XH+ + NH3 -NH: + X where X = Hz. NH2. CH4, HzO, CO, N2, CzH4, CzH6, C3H.5, NzO and CaHs have been measured at 297°K using the flowing afterglow technique. These rate constants and others measured previously in this laboratory for proton transfer reactions involving molecules of lower dipole moment than NH3 were found to compare favourably with predictions of the averagedipoleorientation theory (JJD f 0) and the J_.angevin theory (&D = 0). The ratio kexp/ktheor was found to be CL 1 and relatively independent of the exothermicity of the reaction in the range 0 to 109 kcal mole-'.

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